The N-II or N-2 was a derivative of the American Delta rocket, produced under licence in Japan. It replaced the N-I-rocket in Japanese use. It used a Thor-ELT first stage, a Delta-F|isp}}ond stage, nine Castor SRMs, and on most flights either a Star-37E or Burner-2 upper stage, identical to the US Delta 0100 series configurations. Eight were launched between 1981 and 1987, before it was replaced by the H-I, which featured Japanese-produced upper stages. All eight launches were successful.
 The N-II rocket | |
| Function | Carrier rocket |
|---|---|
| Manufacturer | McDonnell Douglas (design) Mitsubishi Heavy Industries (production) |
| Country of origin | United States (design) Japan (production) |
| Size | |
| Height | 35 m (114 ft 10 in) |
| Diameter | 2.44 m (8 ft 0 in) |
| Mass | 132,690 kg (292,530 lb) |
| Stages | 2 or 3 |
| Capacity | |
| Payload to LEO | |
| Mass | 2,000 kg (4,400 lb) |
| Payload to GTO | |
| Mass | 730 kg (1,610 lb) |
| Associated rockets | |
| Family | Delta |
| Based on | N-I |
| Derivative work | H-I |
| Launch history | |
| Status | Retired |
| Launch sites | Tanegashima, Osaki |
| Total launches | 8 |
| Success(es) | 8 |
| First flight | 11 February 1981 |
| Last flight | 19 February 1987 |
| Boosters – Castor 2 | |
| No. boosters | 9 |
| Maximum thrust | 258.9 kN (58,200 lbf) |
| Specific impulse | 262 s (2.57 km/s) |
| Burn time | 37 seconds |
| Propellant | Solid |
| First stage – Thor-ELT | |
| Powered by | 1 × MB-3-3 |
| Maximum thrust | 866.7 kN (194,800 lbf) |
| Specific impulse | 290 s (2.8 km/s) |
| Burn time | 270 seconds |
| Propellant | RP-1 / LOX |
| Second stage – Delta-F | |
| Powered by | 1 × AJ-10-118F |
| Maximum thrust | 41.3 kN (9,300 lbf) |
| Specific impulse | 280 s (2.7 km/s) |
| Burn time | 335 seconds |
| Propellant | HNO3 / UDMH |
| Third stage (optional) – Star-37E | |
| Maximum thrust | 68 kN (15,000 lbf) |
| Specific impulse | 284 s (2.79 km/s) |
| Burn time | 42 seconds |
| Propellant | Solid |
| Third stage (optional) – Burner II | |
| Maximum thrust | 43.6 kN (9,800 lbf) |
| Specific impulse | 285 s (2.79 km/s) |
| Burn time | 42 seconds |
| Propellant | Solid |
Launch history
edit| Flight No. | Date / time (UTC) | Rocket, Configuration |
Launch site | Payload | Payload mass | Orbit | Customer | Launch outcome |
|---|---|---|---|---|---|---|---|---|
| F7 | 11 February 1981 08:30 |
Tanegashima, Osaki | ETS-4 (Kiku-3)[1] | GTO | Success | |||
| F8 | 10 August 1981 20:03 |
Tanegashima, Osaki | GMS-2 (Himawari-2)[2] | GTO | Success | |||
| F10 | 4 February 1983 08:37 |
Tanegashima, Osaki | CS-2A (Sakura-2A)[3] | GTO | Success | |||
| F11 | 5 August 1983 20:29 |
Tanegashima, Osaki | CS-2B (Sakura-2B)[3] | GTO | Success | |||
| F12 | 23 January 1984 07:58 |
Tanegashima, Osaki | BS-2A (Yuri-2A)[4] | GTO | Success | |||
| F13 | 2 August 1984 20:30 |
Tanegashima, Osaki | GMS-3 (Himawari-3)[2] | GTO | Success | |||
| F14 | 12 February 1986 07:55 |
Tanegashima, Osaki | BS-2B (Yuri-2B)[4] | GTO | Success | |||
| F16 | 19 February 1987 01:23 |
Tanegashima, Osaki | MOS-1 (Momo-1)[5] | LEO | Success | |||
See also
editReferences
edit- ^ "JAXA | Engineering Test Satellite IV "KIKU-3" (ETS-IV)". JAXA | Japan Aerospace Exploration Agency. Retrieved 2020-03-16.
- ^ a b "JAXA | Geostationary Meteorological Satellite "Himawari" (GMS)". JAXA | Japan Aerospace Exploration Agency. Retrieved 2020-03-16.
- ^ a b "JAXA | Communication Satellite "Sakura" (CS)". JAXA | Japan Aerospace Exploration Agency. Retrieved 2020-03-16.
- ^ a b "JAXA | Broadcasting Satellite "Yuri" (BS)". JAXA | Japan Aerospace Exploration Agency. Retrieved 2020-03-16.
- ^ "JAXA | Marine Observation Satellite-1 "Momo-1" (MOS-1)". JAXA | Japan Aerospace Exploration Agency. Retrieved 2020-03-16.
- Wade, Mark. "Delta". Encyclopedia Astronautica. Archived from the original on 2013-08-17. Retrieved 2008-08-31.
- McDowell, Jonathan. "Thor". Orbital and Suborbital Launch Database. Jonathan's Space Report. Archived from the original on 2020-08-01. Retrieved 2008-08-31.
- Krebs, Gunter. "N-2". Gunter's Space Page. Retrieved 2008-08-31.
